A one-side privacy type liquid crystal display device

Abstract

The application provides a one-side privacy type liquid crystal display device. The one-side privacy type liquid crystal display device of the application comprises, in sequence along the light emitting side, a backlight plate, a lower polarizer, a display panel, an upper polarizer and a dye liquid crystal panel; the display panel comprises at least one substrate, at least one conductive layer and a layer of a first liquid crystal composition; the dye liquid crystal panel comprises a first substrate, a first conductive layer, a dye liquid crystal layer and a second substrate; and the dye liquid crystal layer comprises a second liquid crystal composition and dye molecules. The liquid crystal display device of the application has good privacy effect in the one-side viewing angle privacy mode, has good wide viewing angle on the opposite side, and has good viewing angle display effect in the wide viewing angle mode.

Description

[0001] This application is a divisional application of the invention patent application filed on April 20, 2022, with application number 202210416389.2 and invention title "A Single-Sided Privacy-Proof Liquid Crystal Display Device". Technical Field

[0002] This invention relates to a liquid crystal display device, and more specifically, to a single-sided privacy-protected liquid crystal display device. Background Technology

[0003] With the development of display technology, flat panel display devices such as liquid crystal displays (LCDs) are widely used in various consumer electronics products such as mobile phones, televisions, personal digital assistants, digital cameras, and computers due to their advantages such as high quality, energy saving and environmental protection, ultra-thin body and wide range of applications.

[0004] Viewing angle is a crucial performance indicator for liquid crystal display (LCD) panels. LCD panels achieve their display function by adjusting the arrangement of liquid crystal molecules to alter the polarization of transmitted light. However, due to the optical anisotropy of liquid crystal molecules, the viewing angle of an LCD is smaller than that of a cathode ray tube (CRT) display. With technological advancements, technologies such as Vertical Alignment (VA), Polymer Vertical Alignment (PVA), In-Plane Switching (IPS), and Fringe Field Switching (FFS) have emerged to increase the viewing angle of LCDs, enabling wide-viewing-angle displays.

[0005] However, with societal development, people have different requirements for the viewing angle of LCD monitors in different application scenarios. For example, in open environments where privacy is required, such as when entering ATM PINs, viewing private information on public transportation, or conducting business negotiations, a narrow viewing angle is necessary to prevent peeping and protect personal privacy. Conversely, in environments where sharing is required, such as when viewing a display device with others, a wider viewing angle is needed for sharing video conference footage. Furthermore, with the advancement of intelligent instruments, the requirements for display devices go beyond simply switching between wide and narrow viewing angles. They also extend to achieving a narrow viewing angle at a specific angle while maintaining a wide viewing angle relative to the viewpoint. For instance, a normal viewing angle (theta = -30° to 30°) allows for normal display, while a side viewing angle (theta = -50° to -30°) provides privacy protection.

[0006] Currently, there are several main methods to achieve the switching between wide and narrow viewing angles in liquid crystal display devices.

[0007] The first method involves attaching a privacy screen protector to the display. When privacy is needed, the screen is covered by the protector to narrow the viewing angle. However, this method requires a separate privacy screen protector, which is inconvenient for the user. Furthermore, a single privacy screen protector can only provide privacy from one specific angle. Once the protector is attached, the viewing angle is fixed, providing only a narrow viewing angle in that particular direction, and a wider viewing angle cannot be restored.

[0008] The second method involves incorporating a dual-source backlight system into the liquid crystal display (LCD) device to adjust the viewing angle. This system consists of two stacked light guide plates combined with a reflector. The top light guide plate, combined with the reflector, alters the direction of light, confining it to a narrow angle range to achieve a narrow viewing angle. The bottom light guide plate, combined with the reflector, enables a wide viewing angle. However, while this dual-source backlight system can switch between wide and narrow viewing angles, it cannot simultaneously achieve a wide viewing angle at one angle and a narrow viewing angle at another—that is, it cannot provide a single-sided narrow viewing angle.

[0009] The third method involves dividing the driving electrodes on the LCD panel into two types: a wide-viewing-angle driving electrode and a control-viewing-angle electrode. Applying an appropriate voltage to the control-viewing-angle electrode causes light leakage, thus enabling switching between wide and narrow viewing angles. However, using two electrodes on the LCD panel leads to decreased panel brightness and a more complex manufacturing process. Furthermore, it cannot simultaneously achieve a wide viewing angle at one angle and a narrow viewing angle at another, i.e., a single-sided narrow viewing angle.

[0010] How to obtain a liquid crystal display device with a narrow viewing angle on one side and a wide viewing angle on the other side is a problem that urgently needs to be solved in this field. Summary of the Invention

[0011] Purpose of the invention: The purpose of this invention is to provide a single-sided privacy-protecting liquid crystal display device, which has a good privacy protection effect in single-sided viewing privacy mode, a good wide viewing angle on the opposite side, and a good viewing angle display effect in wide viewing angle mode.

[0012] Technical solution: In order to achieve the above-mentioned objectives, the present invention provides a single-sided privacy-protected liquid crystal display device, which includes, in sequence along the light-emitting side, a backlight plate, a lower polarizer, a display panel, an upper polarizer, and a dye-based liquid crystal panel. The display panel includes at least one substrate, at least one conductive layer, and a layer of a first liquid crystal composition; The dye-based liquid crystal panel includes a first substrate, a first conductive layer, a dye-based liquid crystal layer, and a second substrate; and The dye liquid crystal layer comprises a second liquid crystal composition and dye molecules.

[0013] In some embodiments of the present invention, the direction of the upper polarizer and the direction of the lower polarizer are each independently vertical or horizontal; preferably, the direction of the upper polarizer and the direction of the lower polarizer are different; more preferably, the direction of the upper polarizer is vertical; even more preferably, the direction of the upper polarizer is vertical and the direction of the lower polarizer is horizontal.

[0014] In some embodiments of the present invention, the display panel can generate a transverse electric field or a longitudinal electric field when powered on; preferably, the display panel generates a transverse electric field when powered on.

[0015] In some embodiments of the present invention, the display mode of the display panel is TN display mode, STN display mode, VA display mode, IPS display mode, FFS display mode, PSA display mode or PSVA display mode; preferably, the display mode of the display panel is IPS display mode or FFS display mode.

[0016] In some embodiments of the present invention, the display panel includes a first substrate, a first conductive layer, a layer of a first liquid crystal composition, and a second substrate. Further, a second conductive layer is provided between the layer of the first liquid crystal composition and the second substrate.

[0017] In some embodiments of the present invention, the display panel includes a first substrate, a first conductive layer, a layer of a first liquid crystal composition, and a second substrate.

[0018] In some embodiments of the present invention, the display panel includes a first substrate, a first conductive layer, a first alignment layer, a layer of a first liquid crystal composition, a second alignment layer, and a second substrate. Further, a second conductive layer is provided between the second substrate and the second alignment layer.

[0019] In some embodiments of the present invention, the display panel includes a first substrate, a first conductive layer, a first alignment layer, a layer of a first liquid crystal composition, a second alignment layer, and a second substrate.

[0020] In some embodiments of the present invention, the display panel includes a first substrate, a first conductive layer, a first alignment layer, a layer of a first liquid crystal composition, a second alignment layer, a second conductive layer, and a second substrate.

[0021] In some embodiments of the present invention, the dielectric anisotropy of the first liquid crystal composition in the layer of the first liquid crystal composition of the display panel is >0 (e.g., >1, >2, >3, >4, >5, >6, >7).

[0022] In some embodiments of the present invention, the first orientation layer and the second orientation layer comprise polyimide, a polymeric derivative of a light-degradable or ectopic polyamic acid, or a polyorganosiloxane compound.

[0023] In some embodiments of the present invention, in order to generate components perpendicular and parallel to the long axis of the dye liquid crystal in order to make the direction of the incident light perpendicular to and parallel to the long axis of the dye liquid crystal, the display mode of the dye liquid crystal panel is an IPS display mode or an FFS display mode.

[0024] In some embodiments of the present invention, in order to generate components perpendicular and parallel to the long axis of the dye liquid crystal in the direction of the incident light, the dye liquid crystal panel generates a transverse electric field when energized.

[0025] In some embodiments of the present invention, the dye-based liquid crystal panel includes a first substrate, a first conductive layer, a first alignment layer, a dye-based liquid crystal layer, a second alignment layer, and a second substrate.

[0026] In some embodiments of the present invention, the dielectric anisotropy of the second liquid crystal composition in the dye liquid crystal layer of the dye liquid crystal panel is >0 (e.g., >1, >2, >3, >4, >5, >6, >7).

[0027] In some embodiments of the invention, the thickness of the dye liquid crystal layer is 1-12 μm, such as 1 μm, 1.2 μm, 1.4 μm, 1.6 μm, 1.8 μm, 2 μm, 2.2 μm, 2.4 μm, 2.6 μm, 2.8 μm, 3 μm, 3.2 μm, 3.4 μm, 3.6 μm, 3.8 μm, 4 μm, 4.2 μm, 4.4 μm, 4.6 μm, 4.8 μm, 5 μm, 5.2 μm, 5.4 μm, 5.6 μm, 5.8 μm, 6μm, 6.2 μm, 6.4 μm, 6.6 μm, 6.8 μm, 7 μm, 7.2 μm, 7.4 μm, 7.6 μm, 7.8 μm, 8 μm, 8.2 μm, 8.4 μm, 8.6 μm, 8.8 μm, 9 μm, 9.2 μm, 9.4 μm, 9.6 μm, 9.8 μm, 10 μm, 10.2 μm, 10.4 μm, 10.6 μm, 10.8 μm, 11 μm, 11.2 μm, 11.4 μm, 11.6 μm, 11.8 μm, 12 μm, preferably 4-10 μm.

[0028] In some embodiments of the present invention, the single-sided privacy-protected liquid crystal display device of the present invention includes, in sequence along the light-emitting side, a backlight plate, a lower polarizer, a display panel, an upper polarizer, and a dye-based liquid crystal panel; The display panel includes a first substrate, a first conductive layer, a layer of a first liquid crystal composition, and a second substrate; The dye-based liquid crystal panel includes a first substrate, a first conductive layer, a first alignment layer, a dye-based liquid crystal layer, a second alignment layer, and a second substrate. The dye liquid crystal layer comprises a second liquid crystal composition and dye molecules; and The display panel and the dye-based LCD panel each have their own independent display modes: IPS display mode or FFS display mode.

[0029] In some embodiments of the present invention, the single-sided privacy-protected liquid crystal display device of the present invention includes, in sequence along the light-emitting side, a backlight plate, a lower polarizer, a display panel, an upper polarizer, and a dye-based liquid crystal panel; The display panel includes a first substrate, a first conductive layer, a first alignment layer, a layer of a first liquid crystal composition, a second alignment layer, and a second substrate; The dye-based liquid crystal panel includes a first substrate, a first conductive layer, a first alignment layer, a dye-based liquid crystal layer, a second alignment layer, and a second substrate. The dye liquid crystal layer comprises a second liquid crystal composition and dye molecules; and The display panel and the dye-based LCD panel each have their own independent display modes: IPS display mode or FFS display mode.

[0030] In some embodiments of the present invention, the dye molecules in the dye liquid crystal panel are dichroic dye molecules.

[0031] In some embodiments of the present invention, when only the display panel is subjected to voltage, the liquid crystal display device of the present invention is in wide viewing angle mode; when both the display panel and the dye-based liquid crystal panel are subjected to voltage simultaneously, the liquid crystal display device of the present invention is in single-sided viewing angle privacy mode.

[0032] In some embodiments of the present invention, the driving voltage of the display panel is 1V~10V (1V, 1.5V, 2V, 2.5V, 3V, 3.5V, 4V, 4.5V, 5V, 5.5V, 6V, 6.5V, 7V, 7.5V, 8V, 8.5V, 9V, 9.5V, 10V), preferably 2V~10V.

[0033] In some embodiments of the present invention, the driving voltage of the dye-based liquid crystal panel is 1V~10V (1V, 1.5V, 2V, 2.5V, 3V, 3.5V, 4V, 4.5V, 5V, 5.5V, 6V, 6.5V, 7V, 7.5V, 8V, 8.5V, 9V, 9.5V, 10V), preferably 2V~10V.

[0034] In some embodiments of the present invention, when energized, the dye-based liquid crystal panel generates a transverse electric field, driving the second liquid crystal composition and dye molecules to rotate parallel to the substrate surface. The rotation angle of the second liquid crystal composition and dye molecules varies depending on the applied voltage. Due to the dichroism of the dye molecules, when the polarization direction of the incident light is parallel to the long axis of the dye liquid crystal, the light is essentially absorbed by the dye molecules, resulting in no outgoing light emanating from the dye liquid crystal panel. When the polarization direction of the incident light is perpendicular to the long axis of the dye liquid crystal molecules, the light can pass normally through the dye liquid crystal panel. Therefore, depending on the applied voltage, the polarization direction of the incident light forms different vector angles with the dye liquid crystal molecules. Light parallel to the long axis of the dye liquid crystal molecules is absorbed, while light perpendicular to the long axis passes normally. The angle at which the light is absorbed forms a narrow viewing angle, thus achieving privacy protection at that specific angle. The angle at which the light passes normally allows for normal display, thus achieving privacy protection at a single angle.

[0035] In some embodiments of the present invention, the dichroic dye molecule is one or more dyes selected from the group consisting of azo dyes, anthraquinone dyes, phthalocyanine dyes, cyanine dyes, indigo dyes, arylmethanes, nitro groups, and nitroso groups.

[0036] In some embodiments of the present invention, the dichroic dye molecules are selected from the group consisting of azo and anthraquinones.

[0037] In this invention, dichroic dyes exhibit different absorption characteristics in the visible spectrum based on their different structures. A single dichroic dye mainly absorbs light of a specific wavelength, displaying a color that is the complementary color of all transmitted light. However, it is difficult for a single dye to achieve black; therefore, multiple dyes need to be mixed to absorb light of multiple wavelengths. Then, based on the sensitivity of the human eye to light, uniform absorption in the visible light band is achieved, which is called black. For a second liquid crystal composition containing dichroic dyes, the more uniform the absorption of different wavelengths of light in the visible light band, the more uniform the distribution of the transmittance curve will be, and the better the display effect of the display device will be. Therefore, the combination of multiple dichroic dyes needs to be carefully selected in appropriate proportions to achieve better color reproduction. In addition, when the second liquid crystal composition and the dye have good miscibility, the higher the content of the dichroic dye that can be added, the higher the contrast ratio will be.

[0038] In some embodiments of the present invention, the dichroic dye molecules are selected from the group consisting of: In some embodiments of the present invention, the dichroic dye accounts for 0.01%-10% (inclusive of any value or subrange within this range) of the weight percentage of the second liquid crystal composition, for example, 0.1%, 0.5%, 1%, 1.2%, 1.5%, 1.8%, 2%, 2.2%, 2.5%, 2.8%, 3%, 3.2%, 3.5%, 3.8%, 4%, 4.2%, 4.5%, 4.8%, 5%, 5.2%, 5.5%, 5.8%, 6%, 6.2%, 6.5%, 6.8%, 7%, 7.2%, 7.5%, 7.8%, 8%, 8.2%, 8.5%, 8.8%, 9%, 9.2%, 9.5%, 9.8%, 10%, or any two of these values; preferably 1%-6%, and more preferably 2%-4% for better narrow-view privacy protection.

[0039] In some embodiments of the present invention, in a dye-based liquid crystal panel, the second liquid crystal composition comprises at least one compound of general formula M: M, in, R M1 and R M2 Each independently represents a straight-chain or branched alkyl group containing 1-12 carbon atoms. , or One or more non-adjacent -CH2- in a straight-chain or branched alkyl group containing 1-12 carbon atoms may be independently replaced by -CH=CH-, -C≡C-, -O-, -CO-, -CO-O- or -O-CO-; ring ,ring and ring Each represents independently or ,in One or more -CH2- bonds can be replaced by -O- bonds, and one or more single bonds in a ring can be replaced by double bonds. At most one -H in the halogen can be replaced by a halogen; Z M1 and Z M2 Each can independently represent a single bond, -CO-O-, -O-CO-, -CH2O-, -OCH2-, -C≡C-, -CH=CH-, -CH2CH2-, or -(CH2)4-; and n M Represents 0, 1, or 2, where when n M When =2, the ring They can be the same or different, Z M2 They can be the same or different.

[0040] The alkenyl group in this invention is preferably selected from any group represented by formula (V1) to (V9), and particularly preferably formula (V1), formula (V2), formula (V8), or formula (V9). The groups represented by formulas (V1) to (V9) are shown below: , in, This represents the carbon atom in the bonded ring structure.

[0041] The olefinic group in this invention is preferably selected from any group represented by formula (OV1) to (OV9), and particularly preferably formula (OV1), formula (OV2), formula (OV8), or formula (OV9). The groups represented by formulas (OV1) to (OV9) are shown below: , in, This represents the carbon atom in the bonded ring structure.

[0042] In some embodiments of the present invention, the compounds of general formula M are selected from the group consisting of the following compounds: M-1; M-2; M-3; M-4; M-5; M-6; M-7; M-8; M-9; M-10; M-11; M-12; M-13; M-14; M-15; M-16; M-17; M-18; M-19; M-20; M-21; M-22; M-23; M-24; M-25; M-26; M-27; M-28; M-29; and M-30.

[0043] In some embodiments of the present invention, the compound of general formula M accounts for 0.1%-90% (inclusive of any value or subrange within this range) of the second liquid crystal composition, for example, 0.1%, 1%, 2%, 4%, 6%, 8%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 20%, 22%, 24%, 25%, 26%, 28%, 30%, 32%, 34%, 35%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56%, 58%, 60%, 62%, 64%, 66%, 68%, 70%, 72%, 74%, 76%, 78%, 80%, or a range between any two of these values; preferably, the compound of general formula M accounts for 1%-80% of the weight percentage of the second liquid crystal composition.

[0044] In some embodiments of the present invention, in order to obtain a better viewing angle display effect in wide-view mode and a better anti-peeping effect in single-view anti-peeping mode, the compound of general formula M is selected from the group consisting of compounds of general formula M-1, compounds of general formula M-2, compounds of general formula M-6, compounds of general formula M-12, compounds of general formula M-16, compounds of general formula M-19, compounds of general formula M-26, and compounds of general formula M-29.

[0045] In some embodiments of the present invention, in order to obtain a better viewing angle display effect in wide-view mode and a better privacy protection effect in single-view privacy protection mode, the compound of general formula M comprises at least two compounds selected from the group consisting of compounds of general formula M-1, compounds of general formula M-12, compounds of general formula M-16, and compounds of general formula M-29.

[0046] In some embodiments of the present invention, in order to obtain a better viewing angle display effect in wide-viewing-angle mode and a better privacy protection effect in single-sided viewing angle privacy protection mode, the compound of general formula M contains at least two compounds of general formula M-1, preferably containing at least one (e.g., two or three) R M1 or R M2 Each is an independent compound of the general formula M-1 containing an alkenyl group with 2-5 carbon atoms.

[0047] In some embodiments of the present invention, in order to obtain a better viewing angle display effect in wide-viewing-angle mode and a better privacy protection effect in single-sided viewing angle privacy protection mode, the compound of general formula M contains at least two compounds of general formula M-12, preferably, it contains at least one (e.g., two or three) R M1 or R M2 Each is an independent compound of the general formula M-12 containing an alkenyl group with 2-5 carbon atoms.

[0048] In some embodiments of the present invention, in order to obtain a better viewing angle display effect in wide-viewing-angle mode and a better privacy protection effect in single-sided viewing angle privacy protection mode, the compound of general formula M contains at least two compounds of general formula M-16, preferably, it contains at least one (e.g., two or three) R M1 or R M2 Each is an independent compound of the general formula M-16 containing an alkenyl group with 2-5 carbon atoms.

[0049] In some embodiments of the present invention, R M1 and R M2 Preferably, each is independently a straight-chain or branched alkyl group containing 1-10 carbon atoms, a straight-chain or branched alkoxy group containing 1-9 carbon atoms, or a straight-chain or branched alkenyl group containing 2-10 carbon atoms; R M1 and R M2Further preferably, each is independently a straight-chain or branched alkyl group containing 1-8 carbon atoms, a straight-chain or branched alkoxy group containing 1-7 carbon atoms, or a straight-chain or branched alkenyl group containing 2-8 carbon atoms; R M1 and R M2 Further preferred are straight-chain or branched alkyl groups containing 1-5 carbon atoms, straight-chain or branched alkoxy groups containing 1-4 carbon atoms, or straight-chain or branched alkenyl groups containing 2-5 carbon atoms.

[0050] In some embodiments of the present invention, R M1 and R M2 Preferably, each alkenyl group is a straight-chain alkenyl group containing 2-8 carbon atoms; more preferably, each alkenyl group is a straight-chain alkenyl group containing 2-5 carbon atoms.

[0051] In some embodiments of the present invention, preferably, R M1 and R M2 One of them is a straight-chain alkenyl group containing 2-5 carbon atoms, while the other is a straight-chain alkyl group containing 1-5 carbon atoms.

[0052] In some embodiments of the present invention, R M1 and R M2 Preferably, each is an alkyl group containing 1-8 carbon atoms or an alkoxy group containing 1-7 carbon atoms; more preferably, each is an alkyl group containing 1-5 carbon atoms or an alkoxy group containing 1-4 carbon atoms.

[0053] In some embodiments of the present invention, preferably, R M1 and R M2 Either of them is a straight-chain alkyl group containing 1-5 carbon atoms, and the other is a straight-chain alkyl group containing 1-5 carbon atoms, or a straight-chain alkoxy group containing 1-4 carbon atoms; more preferably, R M1 and R M2 Both are independently straight-chain alkyl groups containing 1-5 carbon atoms.

[0054] In some embodiments of the present invention, when reliability is a priority, R is preferred. M1 and R M2 All are alkyl groups; when reducing the volatility of the compound is of priority, R is preferred. M1 and R M2 All are alkoxy groups; when viscosity reduction is a priority, R is preferred. M1 and R M2 At least one of them is an alkenyl group.

[0055] In some embodiments of the present invention, in the dye-based liquid crystal panel, the second liquid crystal composition further comprises at least one compound of general formula A-1 and / or general formula A-2: A-1; A-2, in, R A1 and R A2 Each independently represents a straight-chain or branched alkyl group containing 1-12 carbon atoms. , or One or more non-adjacent -CH2- groups of straight-chain or branched alkyl groups containing 1-12 carbon atoms may be independently replaced by -CH=CH-, -C≡C-, -O-, -CO-, -CO-O-, or -O-CO-, and the straight-chain or branched alkyl groups containing 1-12 carbon atoms... , or One or more -H can be independently replaced by -F or -Cl; ring ,ring ,ring and ring Each represents independently , , or ,in , and One or more -CH2- bonds can be replaced by -O- bonds, and one or more single bonds in a ring can be replaced by double bonds. and One or more -H can be independently replaced by -F, -Cl or -CN, and -CH= in one or more rings can be replaced by -N=; Z A11 Z A21 and Z A22 Each can independently represent a single bond, -CH2CH2-, -CF2CF2-, -CO-O-, -O-CO-, -O-CO-O-, -CH=CH-, -CF=CF-, -CH2O-, or -OCH2-; L A11 L A12 L A13 L A21 and L A22 Each can independently represent -H, an alkyl group containing 1-3 carbon atoms, or a halogen; X A1 and XA2 Each can independently represent a halogen, a haloalkyl or haloalkoxy group containing 1-5 carbon atoms, or a haloalkenyl or haloalkenoxy group containing 2-5 carbon atoms. n A11 Represents 0, 1, 2, or 3, when n A11 When =2 or 3, the ring They can be the same or different, Z A11 They can be the same or different; n A12 Represents 1 or 2, where when n A12 When =2, the ring They can be the same or different; and n A2 Represents 0, 1, 2, or 3, where when n A2 When =2 or 3, the ring They can be the same or different, Z A21 They can be the same or different.

[0056] In some embodiments of the invention, at least one compound of general formula A-1 and / or general formula A-2 accounts for 0.1% to 60% by weight of the second liquid crystal composition (inclusive of any value or subrange within this range), for example 0.1%, 1%, 2%, 4%, 6%, 8%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 20%, 22%, 24%, 25%, 26%, 28%, 30%, 32%, 34%, 35%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56%, 58%, 60%, or a range between any two of these values.

[0057] In some embodiments of the present invention, the compounds of general formula A-1 are selected from the group consisting of: A-1-1; A-1-2; A-1-3; A-1-4; A-1-5; A-1-6; A-1-7; A-1-8; A-1-9; A-1-10; A-1-11; A-1-12; A-1-13; A-1-14; A-1-15; A-1-16; A-1-17; and A-1-18, in, R A1 It indicates a straight-chain or branched alkyl group containing 1-8 carbon atoms, wherein one or more non-adjacent -CH2- can be independently replaced by -CH=CH-, -C≡C-, -O-, -CO-, -CO-O- or -O-CO-, and one or more -H in the straight-chain or branched alkyl group containing 1-8 carbon atoms can be independently replaced by -F or -Cl; R v and R w Each can be represented independently as -CH2- or -O-; L A11 L A12 L A11 '、L A12 '、L A14 L A15 and L A16 Each can be represented independently as -H or -F; L A13 and L A13 Each can be represented independently as -H or -CH3; X A1 It indicates -F, -CF3, or -OCF3; and v and w each independently represent 0 or 1.

[0058] In some embodiments of the present invention, in order to obtain a better viewing angle display effect in wide-view mode and a better anti-peeping effect in single-view anti-peeping mode, the compound of general formula A-1 is selected from the group consisting of the compound of general formula A-1-1, the compound of general formula A-1-7, and the compound of general formula A-1-15.

[0059] In some embodiments of the present invention, in order to obtain a better viewing angle display effect in wide-view mode and a better anti-peeping effect in single-view anti-peeping mode, the compound of general formula A-1 contains at least two (e.g., three or four) compounds of general formula A-1-15.

[0060] In some embodiments of the present invention, the compound of general formula A-1 accounts for 0.1%-50% (inclusive of any value or subrange within this range) of the second liquid crystal composition, for example 0.1%, 1%, 2%, 4%, 6%, 8%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 20%, 22%, 24%, 25%, 26%, 28%, 30%, 32%, 34%, 35%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, or a range between any two of these values. Preferably, the compound of general formula A-1 accounts for 0.1%-40% of the weight of the second liquid crystal composition.

[0061] In some embodiments of the present invention, the compounds of general formula A-2 are selected from the group consisting of the following compounds: A-2-1; A-2-2; A-2-3; A-2-4; A-2-5; A-2-6; A-2-7; A-2-8; A-2-9; A-2-10; A-2-11; A-2-12; A-2-13; A-2-14; A-2-15; A-2-16; A-2-17; and A-2-18, in, R A2 It indicates a straight-chain or branched alkyl group containing 1-8 carbon atoms, wherein one or more non-adjacent -CH2- can be independently replaced by -CH=CH-, -C≡C-, -O-, -CO-, -CO-O- or -O-CO-, and one or more -H in the straight-chain or branched alkyl group containing 1-8 carbon atoms can be independently replaced by -F or -Cl; L A21 L A22 L A23 L A24 and L A25 Each can be represented independently as -H or -F; and X A2 This indicates -F, -CF3, -OCF3, or -CH2CH2CH=CF2.

[0062] In some embodiments of the present invention, in order to obtain a better viewing angle display effect in wide-view mode and a better anti-peeping effect in single-view anti-peeping mode, the compound of general formula A-2 is selected from the group consisting of the compounds of general formula A-2-1, general formula A-2-4, general formula A-2-6, general formula A-2-12, general formula A-2-13, general formula A-2-15, general formula A-2-17, and general formula A-2-18.

[0063] In some embodiments of the present invention, in order to obtain a better viewing angle display effect in wide-view mode and a better anti-peeping effect in single-view anti-peeping mode, the compound of general formula A-2 includes at least one compound of general formula A-2-4 or a compound of general formula A-2-12.

[0064] In some embodiments of the invention, the compound of general formula A-2 accounts for 0.1% to 50% by weight of the second liquid crystal composition (inclusive of any value or subrange within this range), for example, 0.1%, 1%, 2%, 4%, 6%, 8%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 20%, 22%, 24%, 25%, 26%, 28%, 30%, 32%, 34%, 35%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, or a range between any two of these values.

[0065] In some embodiments of the present invention, in order to obtain a better narrow viewing angle privacy effect and enhance the miscibility between the second liquid crystal composition and the dye, in the dye liquid crystal panel, the second liquid crystal composition contains at least one compound of general formula A-1 and general formula A-2.

[0066] In some embodiments of the present invention, in the dye-based liquid crystal panel, the second liquid crystal composition further comprises at least one compound of general formula N: N, in, R N1 and R N2 Each independently represents a straight-chain or branched alkyl group containing 1-12 carbon atoms. , or One or more non-adjacent -CH2- in a straight-chain or branched alkyl group containing 1-12 carbon atoms may be independently replaced by -CH=CH-, -C≡C-, -O-, -CO-, -CO-O- or -O-CO-; ring and ring Each represents independently or ,in One or more -CH2- bonds can be replaced by -O- bonds, and one or more single bonds in a ring can be replaced by double bonds. One or more -H can be independently replaced by -F, -Cl or -CN, and -CH= in one or more rings can be replaced by -N=; Z N1 and Z N2 Each can independently represent a single bond, -CO-O-, -O-CO-, -CH2O-, -OCH2-, -CH=CH-, -C≡C-, -CH2CH2-, -CF2CF2-, -(CH2)4-, -CF2O-, or -OCF2-; L N1 and L N2 Each can independently represent -H, halogen, alkyl group containing 1-3 carbon atoms, or alkoxy group containing 1-3 carbon atoms; and n N1 n represents 0, 1, 2, or 3. N2 Represents 0 or 1, and 0 ≤ n N1 +n N2 ≤3, when n N1 When =2 or 3, the ring They can be the same or different, Z N1 They can be the same or different.

[0067] In some embodiments of the present invention, compounds of general formula N are selected from the group consisting of the following compounds: N-1; N-2; N-3; N-4; N-5; N-6; N-7; N-8; N-9; N-10; N-11; N-12; N-13; N-14; N-15; N-16; N-17; N-18; N-19; N-20; N-21; N-22; N-23; N-24; N-25; N-26; N-27; N-28; N-29; N-30; N-31; N-32; N-33; N-34; N-35; and N-36.

[0068] In some embodiments of the present invention, the compound of general formula N accounts for 0.1%-60% (inclusive of any value or subrange within this range) of the second liquid crystal composition, for example 0.1%, 1%, 2%, 4%, 6%, 8%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 20%, 22%, 24%, 25%, 26%, 28%, 30%, 32%, 34%, 35%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56%, 58%, 60%, or a range between any two of these values; preferably, the compound of general formula N accounts for 1%-55% of the weight percentage of the second liquid crystal composition.

[0069] In some embodiments of the present invention, preferably, R N1 and R N2 Each of these terms independently represents a straight-chain or branched alkyl group containing 1-10 carbon atoms, a straight-chain or branched alkoxy group containing 1-9 carbon atoms, or a straight-chain or branched alkenyl group containing 2-10 carbon atoms; more preferably, R N1 and R N2 Each of these terms independently represents a straight-chain or branched alkyl group containing 1-8 carbon atoms, a straight-chain or branched alkoxy group containing 1-7 carbon atoms, or a straight-chain or branched alkenyl group containing 2-8 carbon atoms; more preferably, R N1 and R N2 Each can be independently represented as a straight-chain or branched alkyl group containing 1-5 carbon atoms, a straight-chain or branched alkoxy group containing 1-4 carbon atoms, or a straight-chain or branched alkenyl group containing 2-5 carbon atoms.

[0070] In some embodiments of the present invention, in the dye-based liquid crystal panel, the second liquid crystal composition further comprises at least one compound of general formula F: F, in, R F1 and R F2 Each can independently represent -H, halogen, or straight-chain or branched alkyl groups containing 1-12 carbon atoms. , , or Alkyl groups containing 1-12 carbon atoms, whether straight-chain or branched. , or One or more non-adjacent -CH2- can be independently replaced by -C≡C-, -O-, -S-, -CO-, -CO-O- or -O-CO-, and one or more -H in a straight-chain or branched alkyl group containing 1-12 carbon atoms can be independently replaced by -F or -Cl. ring and ring Each represents independently , , or ,in , and One or more -CH2- bonds can be replaced by -O- bonds, and one or more single bonds in the ring can be replaced by double bonds, wherein and One or more -H can be independently replaced by -CN, -F or -Cl, and -CH= in one or more rings can be replaced by -N=; X F Indicates -O-, -S-, or -CO-; L F1 and L F2 Each can be independently represented as -H, -F, -Cl, -CF3, or -OCF3; Z F1 and Z F2 Each can independently represent a single bond, -O-, -CO-O-, -O-CO-, -CH2O-, -OCH2-, -CH=CH-, -C≡C-, -CH2CH2-, -CF2CF2-, -(CH2)4-, -CF2O-, or -OCF2-; n F1 and n F2 Each can be independently represented as 0, 1, or 2, where when n F1 When 2 is represented, the ring They can be the same or different, where when n F2 When 2 is represented, the ring They can be the same or different, Z F2 They can be the same or different; and n F4 Represents integers from 0 to 4.

[0071] In some embodiments of the present invention, compounds of general formula F are selected from the group consisting of: F-1; F-2; F-3; F-4; F-5; F-6; F-7; F-8; F-9; F-10; F-11; F-12; F-13; F-14; F-15; F-16; F-17; F-18; F-19; F-20; F-21; F-22; F-23; F-24; F-25; F-26; F-27; F-28; F-29; F-30; F-31, F-32; F-33; F-34; F-35; F-36; and F-37, in, R F2 ’ It represents a straight-chain or branched alkoxy group containing 1-11 carbon atoms; X F1 and X F2 Each can be represented independently as -CH2- or -O-; n F3 Integers representing 1-5 (e.g., 1, 2, 3, 4, or 5); and R F3 It refers to a straight-chain or branched alkyl group containing 1-5 carbon atoms, or a straight-chain or branched alkoxy group containing 1-4 carbon atoms, or a straight-chain or branched alkenyl group containing 2-5 carbon atoms.

[0072] In some embodiments of the invention, the compound of general formula F accounts for 0.1%-30% by weight of the second liquid crystal composition (inclusive of any value or subrange within this range), for example, 0.1%, 0.5%, 1%, 2%, 4%, 6%, 8%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 20%, 22%, 24%, 25%, 26%, 28%, 30%, or a range between any two of these values; preferably 0.1%-25%.

[0073] In some embodiments of the present invention, in the dye-based liquid crystal panel, the second liquid crystal composition further comprises at least one polymerizable compound of general formula RM: RM, in, ring and ring Each represents independently , or ,in and One or more -CH2- bonds can be replaced by -O- bonds, and one or more single bonds in the ring can be replaced by double bonds, wherein and One or more -H atoms may be independently replaced by -F, -Cl, -CN, -Sp3-P3, a halogenated or unhalogenated straight-chain alkyl group containing 1-12 carbon atoms, or a halogenated or unhalogenated straight-chain alkoxy group containing 1-11 carbon atoms. , or Replacement, and in one or more rings -CH= can be replaced by -N=; ring express or ,in or One or more -H atoms may be independently replaced by -F, -Cl, -CN, -Sp3-P3, a halogenated or unhalogenated straight-chain alkyl group containing 1-12 carbon atoms, or a halogenated or unhalogenated straight-chain alkoxy group containing 1-11 carbon atoms. , or Replacement, and in one or more rings -CH= can be replaced by -N=; R1 represents -H, halogen, -CN, -Sp2-P2, or a straight-chain or branched alkyl group containing 1-12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12) carbon atoms. , or Alkyl groups containing 1-12 carbon atoms, either straight-chain or branched. , or One or more non-adjacent -CH2- can be independently replaced by -CH=CH-, -C≡C-, -O-, -CO-, -CO-O- or -O-CO-, and one or more -H can be independently replaced by -F or -Cl; P1, P2, and P3 each independently represent polymerizable groups; Sp1, Sp2, and Sp3 each independently represent a spacer group or a single bond; X0 represents -O-, -S-, or -CO-; Z1 and Z2 independently represent -O-, -S-, -CO-, -CO-O-, -O-CO-, -O-CO-O-, -CH2O-, -OCH2-, -CH2S-, -SCH2-, -CF2O-, -OCF2-, -CF2S-, -SCF2-, and -(CH2). d -, -CF2CH2-, -CH2CF2-, -(CF2) d-, -CH=CH-, -CF=CF-, -CH=CF-, -CF=CH-, -C≡C-, -CH=CH-CO-O-, -O-CO-CH=CH-, -CH2CH2-CO-O-, -O-CO-CH2CH2-, -CHR 1 -、-CR 1 R 2 - or a single bond, where R 1 and R 2 Each of these terms independently represents a straight-chain or branched alkyl group containing 1-12 carbon atoms, and d represents an integer from 1 to 4; and a represents 0, 1, or 2, b represents 0 or 1, where when a represents 2, the ring... They can be the same or different; Z1 can be the same or different.

[0074] In some embodiments of the present invention, the polymerizable compound of general formula RM is selected from the group consisting of the following compounds: RM-1; RM-2; RM-3; RM-4; RM-5; RM-6; RM-7; RM-8; RM-9; RM-10; RM-11; RM-12; RM-13; RM-14; RM-15; RM-16; RM-17; RM-18; RM-19; RM-20; RM-21; RM-22; RM-23; RM-24; RM-25; RM-26; RM-27; RM-28; RM-29; RM-30; RM-31; RM-32; RM-33; RM-34; RM-35; and RM-36, in, X1-X 10 and X 12 Each can independently represent -F, -Cl, -Sp3-P3, or straight-chain alkyl or alkoxy groups containing 1-5 carbon atoms. , or .

[0075] In some embodiments of the present invention, X1-X 10 and X 12 Each can be independently represented as -F, -Cl, -Sp3-P3, -CH3, or -OCH3.

[0076] In some embodiments of the present invention, Sp1 and Sp2 both represent single bonds.

[0077] The polymerizable groups involved in this invention are groups suitable for polymerization reactions (e.g., free radical or ionic polymerization, addition polymerization, or condensation polymerization), or groups suitable for addition or condensation on the polymer backbone. For chain polymerization, polymerizable groups containing -CH=CH- or -C≡C- are particularly preferred; for ring-opening polymerization, oxetyl or epoxy groups are particularly preferred, for example.

[0078] In some embodiments of the present invention, polymerizable groups P1, P2, and P3 are each independently represented. , , , , , , , , , , , , Or -SH; preferably, the polymerizable groups P1, P2, and P3 are each represented independently. , , , , , , , , Or -SH; more preferably, the polymerizable groups P1, P2, and P3 are each independently represented. or .

[0079] As used herein, the term "spacer group" is known to those skilled in the art and is described in references (e.g., Pure Appl. Chem. 2001, 73(5), 888 and C. Tschierske, G. Pelzl, S. Diele, Angew. Chem. 2004, 116, 6340-6368). As used herein, the term "spacer group" refers to a flexible group that connects a mesocrystalline group and a polymerizable group in a polymerizable compound. Typical spacer groups are, for example, -(CH2)p1-, -(CH2CH2O)q1-CH2CH2-, -(CH2CH2S)q1-CH2CH2-, -(CH2CH2NH)q1-CH2CH2-, -CR 0 R 00 -(CH2) p1 -or-(SiR) 0 R 00 -O)p1-, where p1 represents an integer from 1 to 12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12), q1 represents an integer from 1 to 3 (e.g., 1, 2, or 3), and R 0 and R 00Each of the following independently represents -H, a straight-chain or branched alkyl group containing 1-12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12) carbon atoms, or a cycloalkyl group containing 3-12 (e.g., 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12) carbon atoms. Particularly preferred spacer groups are -(CH2)p1-, -(CH2)p1-O-, -(CH2)p1-O-CO-, -(CH2)p1-CO-O-, -(CH2)p1-O-CO-O-, or -CR. 0 R 00 -(CH2) p1 -

[0080] In some embodiments of the invention, the polymerizable compound of general formula RM accounts for 0.001%-5% (inclusive of any value or subrange within this range) of the weight percentage of the second liquid crystal composition, for example, 0.001%, 0.002%, 0.004%, 0.005%, 0.006%, 0.008%, 0.01%, 0.02%, 0.04%, 0.06%, 0.08%, 0.1%, 0.2%, 0.25%, 0.26%, 0.27%, 0.28%, 0.29%, 0.3%, 0.32%, 0.33%, 0.34%, 0.35%, 0.4%, 0.5%, 0.6%, 0.8%, 1%, 1.2%, 1.6%, 1.8%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, or a range between any two of these values.

[0081] In some embodiments of the present invention, in the dye-based liquid crystal panel, the second liquid crystal composition further comprises at least one self-aligning agent of general formula SA: SA, in, R S1 Indicate -Sp 1 -P 1 Alkyl groups containing 1-12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12) carbon atoms, either straight-chain or branched. , or In which one or more non-adjacent -CH2- groups of straight-chain or branched alkyl groups containing 1-12 carbon atoms can be independently replaced by -CH=CH-, -C≡C-, -O-, -CO-, -CO-O-, or -O-CO-, and the straight-chain or branched alkyl groups containing 1-12 carbon atoms... , or One or more -H can be independently replaced by -F or -Cl; ring express or ,in One or more -CH2- bonds can be replaced by -O- bonds, and one or more single bonds in a ring can be replaced by double bonds; Ls1 and Ls3 independently represent -F, -Cl, -CN, -NO2, -NCO, -NCS, -OCN, -SCN, and -C(O)N(R). S0 )2、-C(O)R S0 Alkyl groups containing 1-12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12) carbon atoms, either straight-chain or branched. , or In which one or more non-adjacent -CH2- groups of straight-chain or branched alkyl groups containing 1-12 carbon atoms can be independently replaced by -CH=CH-, -C≡C-, -O-, -CO-, -CO-O-, or -O-CO-, and the straight-chain or branched alkyl groups containing 1-12 carbon atoms... , or One or more -Hs can be independently replaced by -F, where R S0 It refers to a straight-chain or branched alkyl group containing 1 to 12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12) carbon atoms; Ls2 indicates or ; R S2 and R S3 Each independently represents an anchoring group, and the anchoring group is... , , , , , , , , , or ,in This indicates the connection sites in the bonded structure; p represents 1 or 2, where when p represents 2... They can be the same or different; o represents 0 or 1; M S1 express , , or ; I S1 and J S1 Each can be independently represented as -CH2-, -O-, or -S-; N S1 This indicates =O or =S; V K1 V K2 and V K3 Each can be represented independently as -CH= or -N=; X 1 and X 2 Each can be independently represented as -H, -OH, -SH, -NH2, or -NHR. 11 -N(R) 11 )2、-NHC(O)R 11 -OR 11 -C(O)OH, -CHO, or a straight-chain or branched alkyl group containing 1-12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12) carbon atoms, wherein X 1 and X 2 At least one of them is selected from -OH, -SH, -NH2, -NHR 11 The group consisting of -C(O)OH and -CHO, where R 11 It refers to a straight-chain or branched alkyl group containing 1 to 12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12) carbon atoms; P 1 P 2 and P 3 Each independently represents a polymerizable group; Sp 1 Sp 2 Sp 3 Sp 4 Sp 5 Sp 7 and Sp 8 Each can independently represent a spacer group or a single bond; Sp 6 Each represents independently , or ; Z 1 and Z 2Each of these can be independently represented as -O-, -S-, -CO-, -CO-O-, -O-CO-, -O-CO-O-, -CH2O-, -OCH2-, -CH2S-, -SCH2-, -CF2O-, -OCF2-, -CF2S-, -SCF2-, -(CH2) d -, -CF2CH2-, -CH2CF2-, -(CF2) d -, -CH=CH-, -CF=CF-, -CH=CF-, -CF=CH-, -C≡C-, -CH=CH-CO-O-, -O-CO-CH=CH-, -CH2CH2-CO-O-, -O-CO-CH2CH2-, -CHR 1 -、-CR 1 R 2 - or a single bond, where R 1 and R 2 Each of these can be used independently to represent a straight-chain or branched alkyl group containing 1-12 carbon atoms, and d represents an integer from 1 to 4; n s1 Indicates 1, 2, or 3, n s2 Represents 1, 2, 3, or 4, and n s1 +n s2 ≥3, where when n s1 When representing 2 or 3, They can be the same or different, where when n s2 When representing 2, 3 or 4, They can be the same or different; and p s1 p s2 p s3 and p s4 Each can be independently represented as 0, 1, or 2, where when p s1 When representing 2, Ls2 can be the same or different, where when p s2 When representing 2, Ls1 can be the same or different; where when p s3 When 2 is represented, They can be the same or different; where p s4 When representing 2, Ls3 can be the same or different.

[0082] In some embodiments of the present invention, Ls2 represents , , or .

[0083] In some embodiments of the present invention, Sp 3 Sp 4 and Sp 5Each can be independently represented as -(CH2)p1-, -(CH2)p1-O-, -(CH2)p1-O-CO-, -(CH2)p1-CO-O-, -(CH2)p1-O-CO-O-, or -CR 0 R 00 -(CH2) p1 - where p1 represents an integer from 1 to 12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12), and R 0 and R 00 Each independently represents -H or a straight-chain or branched alkyl group containing 1-12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12) carbon atoms, or a cycloalkyl group containing 3-12 (e.g., 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12) carbon atoms; preferably, Sp 3 Sp 4 and Sp 5 Each can be represented independently as -(CH2)p1- or -(CH2)p1-O-.

[0084] In some embodiments of the present invention, the self-aligning agent of general formula SA is selected from the group consisting of the following compounds: SA-1; SA-2; SA-3; SA-4; SA-5; SA-6; SA-7; SA-8; SA-9; SA-10; SA-11; SA-12; SA-13; SA-14; SA-15; SA-16; SA-17; SA-18; SA-19; SA-20; SA-21; SA-22; SA-23; SA-24; SA-25; SA-26; and SA-27, in, Ls 31 This indicates -F, -Cl, -CN, -NO2, -NCO, -NCS, -OCN, -SCN, -C(O)N(R) S0 )2、-C(O)R S0 Alkyl groups containing 1-12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12) carbon atoms, either straight-chain or branched. , or In which one or more non-adjacent -CH2- groups of straight-chain or branched alkyl groups containing 1-12 carbon atoms can be independently replaced by -CH=CH-, -C≡C-, -O-, -CO-, -CO-O-, or -O-CO-, and the straight-chain or branched alkyl groups containing 1-12 carbon atoms... , or One or more -Hs can be independently replaced by -F, where R S0 It refers to a straight-chain or branched alkyl group containing 1 to 12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12) carbon atoms; Ls 21 express or ;and Z 11 Represents -O-, -S-, -CO-, -CO-O-, -O-CO-, -O-CO-O-, -CH2O-, -OCH2-, -CH2S-, -SCH2-, -CF2O-, -OCF2-, -CF2S-, -SCF2-, -(CH2) d-, -CF2CH2-, -CH2CF2-, -(CF2) d -, -CH=CH-, -CF=CF-, -CH=CF-, -CF=CH-, -C≡C-, -CH=CH-CO-O-, -O-CO-CH=CH-, -CH2CH2-CO-O-, -O-CO-CH2CH2-, -CHR 1 -、-CR 1 R 2 - or a single bond, where R 1 and R 2 Each of these characters independently represents a straight-chain or branched alkyl group containing 1 to 12 carbon atoms, and d represents an integer from 1 to 4.

[0085] In some embodiments of the present invention, preferably, Ls1, Ls3 and Ls 31 Each can be independently represented as -F, -Cl, -CN, -NO2, -NCO, -NCS, -OCN, -SCN, -C(O)N(R) S0 )2、-C(O)R S0 A straight-chain or branched alkyl group containing 1-10 carbon atoms, a straight-chain or branched alkoxy group containing 1-9 carbon atoms, or a straight-chain or branched alkenyl group containing 2-10 carbon atoms; more preferably, Ls1, Ls3, and Ls 31 Each can be independently represented as -F, -Cl, a straight-chain or branched alkyl group containing 1-8 carbon atoms, a straight-chain or branched alkoxy group containing 1-7 carbon atoms, or a straight-chain or branched alkenyl group containing 2-8 carbon atoms.

[0086] In some embodiments of the present invention, preferably, R S1 Indicate -Sp 1 -P 1 A straight-chain or branched alkyl group containing 1-10 carbon atoms, a straight-chain or branched alkoxy group containing 1-9 carbon atoms, or a straight-chain or branched alkenyl group containing 2-10 carbon atoms; more preferably, R S1 It refers to a straight-chain or branched alkyl group containing 1-8 carbon atoms, a straight-chain or branched alkoxy group containing 1-7 carbon atoms, or a straight-chain or branched alkenyl group containing 2-8 carbon atoms.

[0087] In some embodiments of the present invention, R S2 and R S3 Each can be represented independently as -OH, -SH, -NH2, or -NHR. 11 -N(R) 11 )2、-NHC(O)R 11 -OR 11 -C(O)OH , , , , , , , , , , or .

[0088] In some embodiments of the present invention, R S2 and R S3 Each group is independently selected from the following groups: in, This indicates the connection sites in the structure to which the bonds are formed.

[0089] In some embodiments of the present invention, R S2 and R S3 Each group is independently selected from the following groups: Furthermore, R S2 and R S3 Each independently is preferably: , , , , , , , , , , or .

[0090] In some embodiments of the present invention, p s1 It represents 1 or 2.

[0091] In some embodiments of the present invention, the self-aligning agent of general formula SA accounts for 0.001% to 5% (inclusive of any value or subrange within this range) of the second liquid crystal composition, for example, 0.001%, 0.005%, 0.05%, 0.1%, 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, 0.45%, 0.5%, 0.55%, 0.6%, 0.65%, 0.7%, 0.75%, 0.8%, 0.85%, 0.9%, 0.95%, 1.0%, 2%, 3%, 4%, 5%, or a range between any two of these values; preferably, the self-aligning agent of general formula SA accounts for 0.1% to 2% of the weight of the second liquid crystal composition.

[0092] In this invention, the self-aligning agent of general formula SA, when added to the second liquid crystal composition, enables the liquid crystal molecules to be aligned even without the presence of a PI alignment layer.

[0093] In some embodiments of the present invention, the first liquid crystal composition comprises at least one compound of general formula M.

[0094] In some embodiments of the invention, the compound of general formula M accounts for 0.1% to 90% by weight of the first liquid crystal composition (inclusive of any value or subrange within this range), for example, 0.1%, 1%, 2%, 4%, 6%, 8%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 20%, 22%, 24%, 25%, 26%, 28%, 30%, 32%, 34%, 35%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56%, 58%, 60%, 62%, 64%, 66%, 68%, 70%, 72%, 74%, 76%, 78%, 80%, or a range between any two of these values.

[0095] In some embodiments of the present invention, the first liquid crystal composition further comprises at least one compound of general formula A-1 and / or general formula A-2.

[0096] In some embodiments of the invention, at least one compound of general formula A-1 and / or general formula A-2 accounts for 0.1% to 60% by weight of the first liquid crystal composition (inclusive of any value or subrange within this range), for example 0.1%, 1%, 2%, 4%, 6%, 8%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 20%, 22%, 24%, 25%, 26%, 28%, 30%, 32%, 34%, 35%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56%, 58%, 60%, or a range between any two of these values.

[0097] In some embodiments of the invention, the compound of general formula A-1 accounts for 0.1% to 50% by weight of the first liquid crystal composition (inclusive of any value or subrange within this range), for example 0.1%, 1%, 2%, 4%, 6%, 8%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 20%, 22%, 24%, 25%, 26%, 28%, 30%, 32%, 34%, 35%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, or a range between any two of these values.

[0098] In some embodiments of the invention, the compound of general formula A-2 accounts for 0.1% to 50% by weight of the first liquid crystal composition (inclusive of any value or subrange within this range), for example 0.1%, 1%, 2%, 4%, 6%, 8%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 20%, 22%, 24%, 25%, 26%, 28%, 30%, 32%, 34%, 35%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, or a range between any two of these values.

[0099] In some embodiments of the present invention, the first liquid crystal composition further comprises at least one compound of general formula N.

[0100] In some embodiments of the invention, the compound of general formula N accounts for 0.1% to 60% by weight of the first liquid crystal composition (inclusive of any value or subrange within this range), for example 0.1%, 1%, 2%, 4%, 6%, 8%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 20%, 22%, 24%, 25%, 26%, 28%, 30%, 32%, 34%, 35%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56%, 58%, 60%, or a range between any two of these values.

[0101] In some embodiments of the present invention, the first liquid crystal composition further comprises at least one compound of general formula F.

[0102] In some embodiments of the invention, the compound of general formula F accounts for 0.1% to 30% by weight of the first liquid crystal composition (inclusive of any value or subrange within this range), for example, 0.1%, 0.5%, 1%, 2%, 4%, 6%, 8%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 20%, 22%, 24%, 25%, 26%, 28%, 30%, or a range between any two of these values.

[0103] In some embodiments of the present invention, the first liquid crystal composition further comprises at least one polymerizable compound of the general formula RM.

[0104] In some embodiments of the invention, the polymerizable compound of general formula RM accounts for 0.001%-5% (inclusive of any value or subrange within this range) of the weight percentage of the first liquid crystal composition, for example, 0.001%, 0.002%, 0.004%, 0.005%, 0.006%, 0.008%, 0.01%, 0.02%, 0.04%, 0.06%, 0.08%, 0.1%, 0.2%, 0.25%, 0.26%, 0.27%, 0.28%, 0.29%, 0.3%, 0.32%, 0.33%, 0.34%, 0.35%, 0.4%, 0.5%, 0.6%, 0.8%, 1%, 1.2%, 1.6%, 1.8%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, or a range between any two of these values.

[0105] In some embodiments of the present invention, the first liquid crystal composition further comprises at least one self-aligning agent of general formula SA.

[0106] In some embodiments of the present invention, the self-aligning agent of general formula SA accounts for 0.001% to 5% (inclusive of any value or subrange within this range) of the weight percentage of the first liquid crystal composition, for example, 0.001%, 0.005%, 0.05%, 0.1%, 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, 0.45%, 0.5%, 0.55%, 0.6%, 0.65%, 0.7%, 0.75%, 0.8%, 0.85%, 0.9%, 0.95%, 1.0%, 2%, 3%, 4%, 5%, or a range between any two of these values.

[0107] On the other hand, the present invention provides an application of a single-sided privacy-protecting liquid crystal display device in the field of single-sided privacy protection.

[0108] In addition to the compounds mentioned above, the second liquid crystal composition of the present invention may also contain conventional nematic liquid crystals, smectic liquid crystals, cholesterol liquid crystals, antioxidants, ultraviolet absorbers, infrared absorbers, photoinitiators, polymerizable monomers, or light stabilizers.

[0109] The following shows possible dopants that are preferably added to the second liquid crystal composition according to the invention: C 15; CB 15; CM 21; R / S-811; CM 44; CM 45; CM 47; CN; R / S-1011; R / S-2011; R / S-3011; R / S-4011; and R / S-5011.

[0110] In some embodiments of the present invention, the dopant accounts for 0%-5% of the weight percentage of the second liquid crystal composition; preferably, the dopant accounts for 0.01%-1% of the weight percentage of the second liquid crystal composition.

[0111] Furthermore, the antioxidants, light stabilizers, and other additives used in the second liquid crystal composition of the present invention are preferably the following substances: Where n represents a positive integer from 1 to 12.

[0112] Preferably, the antioxidant is selected from the light stabilizers shown below: .

[0113] In some embodiments of the present invention, the additive accounts for 0%-5% of the total weight percentage of the second liquid crystal composition; preferably, the additive accounts for 0.01%-1% of the total weight percentage of the second liquid crystal composition.

[0114] In some embodiments of the present invention, the second liquid crystal composition of the present invention comprises at least one photoinitiator as shown below: IE184.

[0115] Beneficial effects: Compared with the prior art, the single-sided privacy-protecting liquid crystal display device provided by the present invention has a better privacy protection effect in the single-sided viewing privacy mode, a better wide viewing angle on its opposite side, and a better viewing angle display effect in the wide viewing angle mode. Attached Figure Description

[0116] Figure 1 Schematic diagram of a single-sided privacy-protected liquid crystal display device Figure 2 Schematic diagram of a dye-based liquid crystal panel (IPS mode) Figure 3 Horizontal view single-sided privacy protection diagram Figure 4 Vertical view single-sided privacy protection diagram Figure 5 Schematic diagram of a dye-based liquid crystal panel (FFS mode) Wherein, 1 represents the backlight panel, 2 represents the lower polarizer, 3 represents the display panel, 4 represents the upper polarizer, 5 represents the dye liquid crystal panel, 5-1 represents the first substrate, 5-2 represents the first alignment layer, 5-3 represents the first electrode, 5-4 represents the second electrode, 5-5 represents the second alignment layer, 5-6 represents the second substrate, 5-7 represents the dye molecule, 5-8 represents the second liquid crystal composition, 5-9 represents the insulating layer, a represents the horizontal plane, b represents the direction of incident light, c represents the component of incident light perpendicular to the long axis of the dye liquid crystal molecule, d represents the dye liquid crystal molecule, e represents the horizontal viewing angle, and f represents the vertical viewing angle. Detailed Implementation

[0117] The present invention will be described below with reference to specific embodiments. It should be noted that the following embodiments are examples of the present invention and are used only to illustrate the invention, not to limit it. Other combinations and various modifications within the scope of the present invention can be made without departing from its spirit or scope.

[0118] For ease of explanation, the group structures of each compound in the following embodiments are represented by the codes listed in Table 1: Table 1. Group structure codes of compounds Take the following compound with the following structural formula as an example: If the structural formula is represented by the codes listed in Table 1, it can be expressed as: nCCGF, where n in the code represents the number of C atoms in the alkyl group at the left end. For example, if n is "3", it means that the alkyl group is -C3H7. In the code, C represents 1,4-cyclohexylene, G represents 2-fluoro-1,4-phenyleneene, and F represents fluorine.

[0119] The abbreviated codes for the test items in the following examples are as follows: in, Cp: ​​Obtained by testing with a melting point apparatus.

[0120] Δn: Δn = n e -n0 was obtained using an Abbe refractometer under a sodium lamp (589 nm) light source at 25°C.

[0121] Δε: Δε = ε ‖ -ε ⊥ , where ε ‖ ε is the dielectric constant parallel to the molecular axis. ⊥ The dielectric constant is perpendicular to the molecular axis; test conditions: 25℃, 1 KHz, VA type test box with a thickness of 6 μm.

[0122] T c Nematic liquid crystal material was placed in a glass bottle and stored in a refrigerator at temperatures of 0℃, -10℃, -20℃, -30℃, and -40℃ respectively. The low-temperature performance was then observed after 10 days. For example, if the sample exhibited a nematic phase at -20℃ but became crystalline or smectic at -30℃, then T... c <-20℃.

[0123] K 11 K 22 and K 33 The CV curve was calculated using an LCR meter and an anti-parallel rubbing cell to test the liquid crystal. Test conditions: 7 μm anti-parallel rubbing cell, V = 0.1~20 V.

[0124] γ1: Measured using the LCM-2 liquid crystal property evaluation system; Test conditions: 25℃, 160-240 V, test cell thickness 20 μm.

[0125] η: Measured using a Brookfield lamina viscometer at a temperature of 25°C.

[0126] τ onThe test results were obtained using a DMS 505 LCD optical measurement system under the following conditions: 25℃ and a TN-type test box with a thickness of 7.0 μm.

[0127] VHR (Initial): Initial voltage retention rate, measured using a TOY06254 LCD property evaluation system; test temperature 65℃, test voltage 5 V, test frequency 6 Hz.

[0128] VHR (UV) was measured using a TOY06254 liquid crystal property evaluation system; the wavelength was 365 nm and the energy was 6000 mJ / cm. 2 The liquid crystal was tested after being irradiated with UV light at a test temperature of 60℃, a test voltage of 5V, a test frequency of 6Hz, and a TN-type test box with a box thickness of 9μm.

[0129] VHR (Ra): Tested using a TOY06254 liquid crystal property evaluation system; the liquid crystal was tested after being held at 150℃ for 1 hour, the test temperature was 60℃, the test voltage was 5 V, the test frequency was 6 Hz, and the test cell thickness was 9 μm.

[0130] All components used in the following embodiments can be synthesized using known methods or obtained commercially. These synthesis techniques are conventional, and the resulting liquid crystal compounds have been tested and found to meet electronic compound standards.

[0131] The second liquid crystal composition was prepared according to the proportions of the liquid crystal compounds specified in the following examples. The second liquid crystal composition was prepared according to conventional methods in the art, such as mixing in proportion by heating, ultrasound, suspension, etc.

[0132] Example 1 This embodiment provides a schematic diagram of the structure of a single-sided privacy-protecting liquid crystal display device, as shown below. Figure 1 The display device includes a backlight panel 1, a lower polarizer 2, a display panel 3, an upper polarizer 4, and a dye-based liquid crystal panel 5, wherein the direction of the lower polarizer 2 is 0° and the direction of the upper polarizer 4 is 90°.

[0133] The structural schematic diagram of the dye-based liquid crystal panel provided in this embodiment is as follows: Figure 2 As shown, the dye-based liquid crystal panel includes a first substrate 5-1, a first conductive layer (IPS display mode) composed of a first electrode 5-3 and a second electrode 5-4, a first alignment layer 5-2, a dye-based liquid crystal layer composed of dye molecules 5-7 and a second liquid crystal composition 5-8, a second alignment layer 5-5, and a second substrate 5-6, wherein the first alignment layer and the second alignment layer are rubbed in antiparallel directions at 0°, and the thickness of the dye-based liquid crystal layer is 4 μm.

[0134] Wide viewing angle mode (Share): Only voltage is applied to the display panel to enable normal display. The long axis of the dye liquid crystal in the dye liquid crystal panel is 0°. The emitted light from the display panel is perpendicular to the long axis of the dye liquid crystal molecules, and the emitted light from the display panel can pass through normally. At this time, all viewing angles are displayed normally, which is the sharing mode.

[0135] Single-view privacy mode: Voltage is applied to both the display panel and the dye-based liquid crystal panel simultaneously. Driven by the voltage, the dye-based liquid crystals in the panel rotate horizontally. The emitted light from the display panel forms a vector angle with the long axis of the dye-based liquid crystal molecules, such as... Figure 3 At angle α, light perpendicular to the long axis of the dye liquid crystal molecules passes through normally, while light parallel to the long axis of the liquid crystal molecules is absorbed. This results in a deterioration in the display at viewing angle A, while viewing angle B can display normally, thus achieving the privacy mode at viewing angle A.

[0136] Example 2 This embodiment provides a schematic diagram of the structure of a single-sided privacy-protecting liquid crystal display device, as shown below. Figure 1 The display device includes a backlight panel 1, a lower polarizer 2, a display panel 3, an upper polarizer 4, and a dye-based liquid crystal panel 5, wherein the direction of the lower polarizer 2 is 0° and the direction of the upper polarizer 4 is 90°.

[0137] The structural schematic diagram of the dye-based liquid crystal panel provided in this embodiment is as follows: Figure 2 As shown, the dye-based liquid crystal panel includes a first substrate 5-1, a first conductive layer (IPS display mode) composed of a first electrode 5-3 and a second electrode 5-4, a first alignment layer 5-2, a dye-based liquid crystal layer composed of dye molecules 5-7 and a second liquid crystal composition 5-8, a second alignment layer 5-5, and a second substrate 5-6, wherein the first alignment layer and the second alignment layer are rubbed in antiparallel directions at 0°, and the thickness of the dye-based liquid crystal layer is 6 μm.

[0138] Wide viewing angle mode (Share): Only voltage is applied to the display panel to enable normal display. The long axis of the dye liquid crystal in the dye liquid crystal panel is 0°. The emitted light from the display panel is perpendicular to the long axis of the dye liquid crystal molecules, and the emitted light from the display panel can pass through normally. At this time, all viewing angles are displayed normally, which is the sharing mode.

[0139] Single-view privacy mode: Voltage is applied to both the display panel and the dye-based liquid crystal panel simultaneously. Driven by the voltage, the dye-based liquid crystals in the panel rotate horizontally. The emitted light from the display panel forms a vector angle with the long axis of the dye-based liquid crystal molecules, such as... Figure 3 At angle α, light perpendicular to the long axis of the dye liquid crystal molecules passes through normally, while light parallel to the long axis of the liquid crystal molecules is absorbed. This results in a deterioration in the display at viewing angle A, while viewing angle B can display normally, thus achieving the privacy mode at viewing angle A.

[0140] Example 3 This embodiment provides a schematic diagram of the structure of a single-sided privacy-protecting liquid crystal display device, as shown below. Figure 1 The display device includes a backlight panel 1, a lower polarizer 2, a display panel 3, an upper polarizer 4, and a dye-based liquid crystal panel 5, wherein the direction of the lower polarizer 2 is 0° and the direction of the upper polarizer 4 is 90°.

[0141] The structural schematic diagram of the dye-based liquid crystal panel provided in this embodiment is as follows: Figure 2 As shown, the dye-based liquid crystal panel includes a first substrate 5-1, a first conductive layer (IPS display mode) composed of a first electrode 5-3 and a second electrode 5-4, a first alignment layer 5-2, a dye-based liquid crystal layer composed of dye molecules 5-7 and a second liquid crystal composition 5-8, a second alignment layer 5-5, and a second substrate 5-6, wherein the first alignment layer and the second alignment layer are rubbed in antiparallel directions at 0°, and the thickness of the dye-based liquid crystal layer is 8 μm.

[0142] Wide viewing angle mode (Share): Only voltage is applied to the display panel to enable normal display. The long axis of the dye liquid crystal in the dye liquid crystal panel is 0°. The emitted light from the display panel is perpendicular to the long axis of the dye liquid crystal molecules, and the emitted light from the display panel can pass through normally. At this time, all viewing angles are displayed normally, which is the sharing mode.

[0143] Single-view privacy mode: Voltage is applied to both the display panel and the dye-based liquid crystal panel simultaneously. Driven by the voltage, the dye-based liquid crystals in the panel rotate horizontally. The emitted light from the display panel forms a vector angle with the long axis of the dye-based liquid crystal molecules, such as... Figure 3 At angle α, light perpendicular to the long axis of the dye liquid crystal molecules passes through normally, while light parallel to the long axis of the liquid crystal molecules is absorbed. This results in a deterioration in the display at viewing angle A, while viewing angle B can display normally, thus achieving the privacy mode at viewing angle A.

[0144] Example 4 This embodiment provides a schematic diagram of the structure of a single-sided privacy-protecting liquid crystal display device, as shown below. Figure 1 The display device includes a backlight panel 1, a lower polarizer 2, a display panel 3, an upper polarizer 4, and a dye-based liquid crystal panel 5, wherein the direction of the lower polarizer 2 is 0° and the direction of the upper polarizer 4 is 90°.

[0145] The structural schematic diagram of the dye-based liquid crystal panel provided in this embodiment is as follows: Figure 2As shown, the dye-based liquid crystal panel includes a first substrate 5-1, a first conductive layer (IPS display mode) composed of a first electrode 5-3 and a second electrode 5-4, a first alignment layer 5-2, a dye-based liquid crystal layer composed of dye molecules 5-7 and a second liquid crystal composition 5-8, a second alignment layer 5-5, and a second substrate 5-6, wherein the first alignment layer and the second alignment layer are rubbed in antiparallel directions at 0°, and the thickness of the dye-based liquid crystal layer is 10 μm.

[0146] Wide viewing angle mode (Share): Only voltage is applied to the display panel to enable normal display. The long axis of the dye liquid crystal in the dye liquid crystal panel is 0°. The emitted light from the display panel is perpendicular to the long axis of the dye liquid crystal molecules, and the emitted light from the display panel can pass through normally. At this time, all viewing angles are displayed normally, which is the sharing mode.

[0147] Single-view privacy mode: Voltage is applied to both the display panel and the dye-based liquid crystal panel simultaneously. Driven by the voltage, the dye-based liquid crystals in the panel rotate horizontally. The emitted light from the display panel forms a vector angle with the long axis of the dye-based liquid crystal molecules, such as... Figure 3 At angle α, light perpendicular to the long axis of the dye liquid crystal molecules passes through normally, while light parallel to the long axis of the liquid crystal molecules is absorbed. This results in a deterioration in the display at viewing angle A, while viewing angle B can display normally, thus achieving the privacy mode at viewing angle A.

[0148] Example 5 This embodiment provides a schematic diagram of the structure of a single-sided privacy-protecting liquid crystal display device, as shown below. Figure 1 The display device includes a backlight panel 1, a lower polarizer 2, a display panel 3, an upper polarizer 4, and a dye-based liquid crystal panel 5, wherein the direction of the lower polarizer 2 is 90° and the direction of the upper polarizer 4 is 0°.

[0149] The structural schematic diagram of the dye-based liquid crystal panel provided in this embodiment is as follows: Figure 2 As shown, the dye-based liquid crystal panel includes a first substrate 5-1, a first conductive layer (IPS display mode) composed of a first electrode 5-3 and a second electrode 5-4, a first alignment layer 5-2, a dye-based liquid crystal layer composed of dye molecules 5-7 and a second liquid crystal composition 5-8, a second alignment layer 5-5, and a second substrate 5-6, wherein the first alignment layer and the second alignment layer are rubbed in antiparallel directions at 90°, and the thickness of the dye-based liquid crystal layer is 4μm.

[0150] Wide viewing angle mode (Share): Only voltage is applied to the display panel to enable normal display. The long axis of the dye liquid crystal in the dye liquid crystal panel is at 90°. The emitted light from the display panel is perpendicular to the long axis of the dye liquid crystal molecules, and the emitted light from the display panel can pass through normally. At this time, all viewing angles can be displayed normally, which is the sharing mode.

[0151] Single-view privacy mode: Voltage is applied to both the display panel and the dye-based liquid crystal panel simultaneously. Driven by the voltage, the dye-based liquid crystals in the panel rotate horizontally. The emitted light from the display panel forms a vector angle with the long axis of the dye-based liquid crystal molecules, such as... Figure 4 At angle β, light perpendicular to the long axis of the dye liquid crystal molecules passes through normally, while light parallel to the long axis of the liquid crystal molecules is absorbed, resulting in a deterioration in the display at viewing angle D, while viewing angle C can display normally, thus achieving the privacy mode at viewing angle D.

[0152] Example 6 This embodiment provides a schematic diagram of the structure of a single-sided privacy-protecting liquid crystal display device, as shown below. Figure 1 The display device includes a backlight panel 1, a lower polarizer 2, a display panel 3, an upper polarizer 4, and a dye-based liquid crystal panel 5, wherein the direction of the lower polarizer 2 is 0° and the direction of the upper polarizer 4 is 90°.

[0153] The structural schematic diagram of the dye-based liquid crystal panel provided in this embodiment is as follows: Figure 5 As shown, the dye-based liquid crystal panel includes a first substrate 5-1, a first conductive layer (FFS display mode) composed of a first electrode 5-3, a second electrode 5-4 and an insulating layer 5-9, a first alignment layer 5-2, a dye-based liquid crystal layer composed of dye molecules 5-7 and a second liquid crystal composition 5-8, a second alignment layer 5-5 and a second substrate 5-6, wherein the first alignment layer and the second alignment layer are subjected to antiparallel friction with a friction direction of 0°, and the thickness of the dye-based liquid crystal layer is 4 μm.

[0154] Wide viewing angle mode (Share): Only voltage is applied to the display panel to enable normal display. The long axis of the dye liquid crystal in the dye liquid crystal panel is 0°. The emitted light from the display panel is perpendicular to the long axis of the dye liquid crystal molecules, and the emitted light from the display panel can pass through normally. At this time, all viewing angles are displayed normally, which is the sharing mode.

[0155] Single-view privacy mode: Voltage is applied to both the display panel and the dye-based liquid crystal panel simultaneously. Driven by the voltage, the dye-based liquid crystals in the panel rotate horizontally. The emitted light from the display panel forms a vector angle with the long axis of the dye-based liquid crystal molecules, such as... Figure 3 At angle α, light perpendicular to the long axis of the dye liquid crystal molecules passes through normally, while light parallel to the long axis of the liquid crystal molecules is absorbed. This results in a deterioration in the display at viewing angle A, while viewing angle B can display normally, thus achieving the privacy mode at viewing angle A.

[0156] Example 7 This embodiment provides a schematic diagram of the structure of a single-sided privacy-protecting liquid crystal display device, as shown below. Figure 1The display device includes a backlight panel 1, a lower polarizer 2, a display panel 3, an upper polarizer 4, and a dye-based liquid crystal panel 5, wherein the direction of the lower polarizer 2 is 90° and the direction of the upper polarizer 4 is 0°.

[0157] The structural schematic diagram of the dye-based liquid crystal panel provided in this embodiment is as follows: Figure 5 As shown, the dye-based liquid crystal panel includes a first substrate 5-1, a first conductive layer (FFS display mode) composed of a first electrode 5-3, a second electrode 5-4 and an insulating layer 5-9, a first alignment layer 5-2, a dye-based liquid crystal layer composed of dye molecules 5-7 and a second liquid crystal composition 5-8, a second alignment layer 5-5 and a second substrate 5-6, wherein the first alignment layer and the second alignment layer are subjected to antiparallel friction with a friction direction of 90°, and the thickness of the dye-based liquid crystal layer is 6 μm.

[0158] Wide viewing angle mode (Share): Only voltage is applied to the display panel to enable normal display. The long axis of the dye liquid crystal in the dye liquid crystal panel is 90°. The emitted light from the display panel is perpendicular to the long axis of the dye liquid crystal molecules, and the emitted light from the display panel can pass through normally. At this time, all viewing angles can be displayed normally, which is the sharing mode.

[0159] Single-view privacy mode: Voltage is applied to both the display panel and the dye-based liquid crystal panel simultaneously. Driven by the voltage, the dye-based liquid crystals in the panel rotate horizontally. The emitted light from the display panel forms a vector angle with the long axis of the dye-based liquid crystal molecules, such as... Figure 4 At angle β, light perpendicular to the long axis of the dye liquid crystal molecules passes through normally, while light parallel to the long axis of the liquid crystal molecules is absorbed, resulting in a deterioration in the display at viewing angle D, while viewing angle C can display normally, thus achieving the privacy mode at viewing angle D.

[0160] Example 8 This embodiment provides a schematic diagram of the structure of a single-sided privacy-protecting liquid crystal display device, as shown below. Figure 1 The display device includes a backlight panel 1, a lower polarizer 2, a display panel 3, an upper polarizer 4, and a dye-based liquid crystal panel 5, wherein the direction of the lower polarizer 2 is 90° and the direction of the upper polarizer 4 is 0°.

[0161] The structural schematic diagram of the dye-based liquid crystal panel provided in this embodiment is as follows: Figure 5 As shown, the dye-based liquid crystal panel includes a first substrate 5-1, a first conductive layer (FFS display mode) composed of a first electrode 5-3, a second electrode 5-4 and an insulating layer 5-9, a first alignment layer 5-2, a dye-based liquid crystal layer composed of dye molecules 5-7 and a second liquid crystal composition 5-8, a second alignment layer 5-5 and a second substrate 5-6, wherein the first alignment layer and the second alignment layer are subjected to antiparallel friction with a friction direction of 90°, and the thickness of the dye-based liquid crystal layer is 4 μm.

[0162] Wide viewing angle mode (Share): Only voltage is applied to the display panel to enable normal display. The long axis of the dye liquid crystal in the dye liquid crystal panel is 90°. The emitted light from the display panel is perpendicular to the long axis of the dye liquid crystal molecules, and the emitted light from the display panel can pass through normally. At this time, all viewing angles can be displayed normally, which is the sharing mode.

[0163] Single-view privacy mode: Voltage is applied to both the display panel and the dye-based liquid crystal panel simultaneously. Driven by the voltage, the dye-based liquid crystals in the panel rotate horizontally. The emitted light from the display panel forms a vector angle with the long axis of the dye-based liquid crystal molecules, such as... Figure 4 At angle β, light perpendicular to the long axis of the dye liquid crystal molecules passes through normally, while light parallel to the long axis of the liquid crystal molecules is absorbed, resulting in a deterioration in the display at viewing angle D, while viewing angle C can display normally, thus achieving the privacy mode at viewing angle D.

[0164] The following example uses the single-sided privacy-protected liquid crystal display device constructed in Example 1. Different liquid crystal compositions were filled into a dye-based liquid crystal panel, and its display performance and brightness values ​​at different viewing angles were tested to illustrate the display effect of the single-sided privacy-protected liquid crystal display device of this application in wide-viewing-angle mode and single-sided viewing-angle privacy mode. It should be noted that the single-sided privacy-protected liquid crystal display devices listed in Examples 2 to 8 and those falling within the scope of this application can all produce comparable display effects.

[0165] Application Example 1 The second liquid crystal composition 1 was prepared according to the compounds and their weight percentages listed in Table 2. A dye accounting for 4% of the mass percentage of the second liquid crystal composition was added to the second liquid crystal composition 1, and the composition was filled into the dye liquid crystal panel of Example 1 of this application for performance testing.

[0166] Table 2. Formulation and performance parameter test results of the second liquid crystal composition The brightness values ​​at different angles in LCD master mode and single-view privacy mode were simulated using LCD master, as shown in Tables 3 and 4. Where phi represents the angle in the azimuth plane (horizontal plane), and theta represents the angle in the pitch plane (vertical plane); the brightness value of theta = -10° to -80° in the horizontal viewing angle corresponds to the brightness value when phi = 180°, and the brightness value of theta = 10° to 80° in the horizontal viewing angle corresponds to the brightness value when phi = 0°.

[0167] Based on the simulated test conditions of this embodiment, when the Privacy / Share ratio is ≤45%, the viewing angle deteriorates, achieving the technical effect of privacy protection. Furthermore, when the Privacy / Share ratio is ≤40%, it can achieve a better privacy protection effect.

[0168] As can be seen from the data in Tables 3, 4, and 5, the second liquid crystal composition filled in the display device of this application has a higher clearing point and a larger optical anisotropy (Δn, n). e (n0), larger dielectric anisotropy (Δε, ε) ‖ ε ⊥ ), and a relatively large elastic constant (K) 11 K 22 K 33 When the following conditions are met (low rotational viscosity, low volumetric viscosity, good low-temperature storage phase transition point, and good voltage retention stability (VHR(initial), VHR(UV), VHR(Ra))), this application can meet the wide-viewing-angle display requirements within the angle range of theta = -80° to 80° in wide-viewing-angle mode. In single-sided viewing-angle privacy mode, this application achieves a Privacy / Share ratio ≤ 45% within the angle range of theta = -50° to -30°, enabling narrow-viewing-angle display while maintaining normal display at other angles, thus achieving single-sided privacy within the angle range of theta = -50° to -30°.

[0169] Application Example 2 The second liquid crystal composition 2 was prepared according to the compounds and their weight percentages listed in Table 6. A dye accounting for 2% of the mass percentage of the second liquid crystal composition was added to the second liquid crystal composition 2, and the composition was filled into the dye liquid crystal panel of Example 1 of this application for performance testing.

[0170] Table 6. Formulation and performance parameter test results of the second liquid crystal composition The brightness values ​​of the wide-viewing-angle mode and the single-sided viewing-angle privacy mode under horizontal angles were simulated using LCD Master, as shown in Table 7. The relative values ​​of the wide-viewing-angle mode relative to theta=0° were calculated (e.g., the relative value of theta=80° relative to theta=0° is calculated as: (brightness value of theta=80°) / (brightness value of theta=0°)). The relative values ​​of the single-sided viewing-angle privacy mode relative to theta=40° were calculated (e.g., the relative value of theta=80° relative to theta=40° is calculated as: (brightness value of theta=80°) / (brightness value of theta=40°)). The results are shown in Table 8. The ratio of the brightness value of the horizontal viewing-angle privacy mode to the brightness value of the sharing mode (Privacy / Share) is shown in Table 12.

[0171] Application Example 3 The second liquid crystal composition 3 was prepared according to the compounds and their weight percentages listed in Table 9. A dye accounting for 3.5% of the mass percentage of the second liquid crystal composition was added to the second liquid crystal composition 3, and the composition was filled into the dye liquid crystal panel of Example 1 of this application for performance testing.

[0172] Table 9. Formulation and performance parameter test results of the second liquid crystal composition The brightness values ​​of the wide-viewing-angle mode and the single-sided viewing-angle privacy mode under horizontal angles were simulated using LCD Master, as shown in Table 7. The relative values ​​of the wide-viewing-angle mode relative to theta=0° were calculated (e.g., the relative value of theta=80° relative to theta=0° is calculated as: (brightness value of theta=80°) / (brightness value of theta=0°)). The relative values ​​of the single-sided viewing-angle privacy mode relative to theta=40° were calculated (e.g., the relative value of theta=80° relative to theta=40° is calculated as: (brightness value of theta=80°) / (brightness value of theta=40°)). The results are shown in Table 8. The ratio of the brightness value of the horizontal viewing-angle privacy mode to the brightness value of the sharing mode (Privacy / Share) is shown in Table 12.

[0173] Application Example 4 The second liquid crystal composition 4 was prepared according to the compounds and their weight percentages listed in Table 10. A dye accounting for 2% of the mass percentage of the second liquid crystal composition was added to the second liquid crystal composition 4, and the composition was filled into the dye liquid crystal panel of Example 1 of this application for performance testing.

[0174] Table 10. Formulation and performance parameter test results of the second liquid crystal composition The brightness values ​​of the wide-viewing-angle mode and the single-sided viewing-angle privacy mode under horizontal angles were simulated using LCD Master, as shown in Table 7. The relative values ​​of the wide-viewing-angle mode relative to theta=0° were calculated (e.g., the relative value of theta=80° relative to theta=0° is calculated as: (brightness value of theta=80°) / (brightness value of theta=0°)). The relative values ​​of the single-sided viewing-angle privacy mode relative to theta=40° were calculated (e.g., the relative value of theta=80° relative to theta=40° is calculated as: (brightness value of theta=80°) / (brightness value of theta=40°)). The results are shown in Table 8. The ratio of the brightness value of the horizontal viewing-angle privacy mode to the brightness value of the sharing mode (Privacy / Share) is shown in Table 12.

[0175] Application Example 5 The second liquid crystal composition 5 was prepared according to the compounds and their weight percentages listed in Table 11. A dye accounting for 3% of the mass percentage of the second liquid crystal composition was added to the second liquid crystal composition 5, and the composition was filled into the dye liquid crystal panel of Example 1 of this application for performance testing.

[0176] Table 11. Formulation and performance parameter test results of the second liquid crystal composition The brightness values ​​of the wide-viewing-angle mode and the single-sided viewing-angle privacy mode under horizontal angles were simulated using LCD Master, as shown in Table 7. The relative values ​​of the wide-viewing-angle mode relative to theta=0° were calculated (e.g., the relative value of theta=80° relative to theta=0° is calculated as: (brightness value of theta=80°) / (brightness value of theta=0°)). The relative values ​​of the single-sided viewing-angle privacy mode relative to theta=40° were calculated (e.g., the relative value of theta=80° relative to theta=40° is calculated as: (brightness value of theta=80°) / (brightness value of theta=40°)). The results are shown in Table 8. The ratio of the brightness value of the horizontal viewing-angle privacy mode to the brightness value of the sharing mode (Privacy / Share) is shown in Table 12. As can be seen from the data in Tables 7, 8, and 12, the second liquid crystal composition filled in the display device of this application has a higher clearing point and a larger optical anisotropy (Δn, n). e (n0), larger dielectric anisotropy (Δε, ε) ‖ ε ⊥ ), and a relatively large elastic constant (K)11 K 22 K 33 When the following conditions are met (low rotational viscosity, low volumetric viscosity, good low-temperature storage phase transition point, and good voltage retention stability (VHR(initial), VHR(UV), VHR(Ra))), the brightness values ​​of theta=-80°~-10° and theta=10°~80° in wide viewing angle mode have a large relative value compared to the brightness value of theta=0° (the brightness values ​​of theta=-80°~-10° and theta=10°~80° change little compared to the brightness value of theta=0°), that is, it has a good display effect within the angle range of theta=-80°~80°, which can meet the display requirements of wide viewing angle. In the single-view privacy mode, the brightness values ​​of theta=-80°~30° and theta=50°~80° have smaller relative values ​​compared to the brightness value of theta=40° (the brightness values ​​of theta=-80°~30° and theta=50°~80° vary more compared to the brightness value of theta=40°). Moreover, within the angle range of theta=-50°~-30°, the Privacy / Share ratio is ≤45%. That is, this application can achieve narrow viewing angle display within the angle range of theta=-50°~-30°, while the Privacy / Share ratio is higher in other viewing angles, allowing for normal display. Thus, single-view privacy is achieved within the angle range of theta=-50°~-30°.

[0177] In summary, the single-sided privacy-protecting liquid crystal display device of this application has a good display effect in wide-viewing-angle mode and a wide viewing angle. In single-sided viewing-angle privacy-protecting mode, it can achieve the technical effect of single-sided privacy protection.

[0178] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A single-sided privacy-protected liquid crystal display device, characterized in that, Along the light-emitting side, it includes, in sequence, a backlight panel, a lower polarizer, a display panel, an upper polarizer, and a dye-based liquid crystal panel; The display panel includes at least one substrate, at least one conductive layer, and a layer of a first liquid crystal composition; The dye-based liquid crystal panel includes a first substrate, a first conductive layer, a dye-based liquid crystal layer, and a second substrate; and The dye liquid crystal layer comprises a second liquid crystal composition and dye molecules.

2. The liquid crystal display device according to claim 1, characterized in that, The direction of the upper polarizer and the direction of the lower polarizer are each independently either vertical or horizontal.

3. The liquid crystal display device according to claim 1, characterized in that, When powered on, the display panel generates a transverse electric field.

4. The liquid crystal display device according to claim 1, characterized in that, When powered on, the dye-based liquid crystal panel generates a transverse electric field.

5. The liquid crystal display device according to claim 1, characterized in that, The dye-based liquid crystal panel includes a first substrate, a first conductive layer, a first alignment layer, the dye-based liquid crystal layer, a second alignment layer, and a second substrate.

6. The liquid crystal display device according to claim 5, characterized in that, The thickness of the dye liquid crystal layer is 1-12 μm.

7. The liquid crystal display device according to claim 1, characterized in that, When only the display panel is energized, the liquid crystal display device is in wide-viewing-angle mode; when both the display panel and the dye-based liquid crystal panel are energized, the liquid crystal display device is in single-viewing-angle privacy mode.

8. The liquid crystal display device according to claim 1, characterized in that, In the dye-based liquid crystal panel, the dye molecules are dichroic dye molecules.

9. The liquid crystal display device according to claim 1, characterized in that, In the dye-based liquid crystal panel, the second liquid crystal composition comprises at least one compound of general formula M: M， in, R M1 and R M2 Each independently represents a straight-chain or branched alkyl group containing 1-12 carbon atoms. , or One or more non-adjacent -CH2- in the straight-chain or branched alkyl group containing 1-12 carbon atoms may be independently replaced by -CH=CH-, -C≡C-, -O-, -CO-, -CO-O- or -O-CO-; ring ,ring and ring Each represents independently or ,in One or more -CH2- bonds can be replaced by -O- bonds, and one or more single bonds in a ring can be replaced by double bonds. At most one -H in the halogen can be replaced by a halogen; Z M1 and Z M2 Each can independently represent a single bond, -CO-O-, -O-CO-, -CH2O-, -OCH2-, -C≡C-, -CH=CH-, -CH2CH2-, or -(CH2)4-; and n M Represents 0, 1, or 2, where when n M When =2, the ring They can be the same or different, Z M2 They can be the same or different.

10. The liquid crystal display device according to claim 9, characterized in that, In the dye-based liquid crystal panel, the second liquid crystal composition further comprises at least one compound of general formula A-1 and / or general formula A-2: A-1； A-2， in, R A1 and R A2 Each independently represents a straight-chain or branched alkyl group containing 1-12 carbon atoms. , or One or more non-adjacent -CH2- groups of the straight-chain or branched alkyl group containing 1-12 carbon atoms may be independently replaced by -CH=CH-, -C≡C-, -O-, -CO-, -CO-O-, or -O-CO-, and the straight-chain or branched alkyl group containing 1-12 carbon atoms... , or One or more -H can be independently replaced by -F or -Cl; ring ,ring ,ring and ring Each represents independently , , or ,in , and One or more -CH2- bonds can be replaced by -O- bonds, and one or more single bonds in a ring can be replaced by double bonds. and One or more -H can be independently replaced by -F, -Cl or -CN, and -CH= in one or more rings can be replaced by -N=; Z A11 Z A21 and Z A22 Each can independently represent a single bond, -CH2CH2-, -CF2CF2-, -CO-O-, -O-CO-, -O-CO-O-, -CH=CH-, -CF=CF-, -CH2O-, or -OCH2-; L A11 L A12 L A13 L A21 and L A22 Each can independently represent -H, an alkyl group containing 1-3 carbon atoms, or a halogen; X A1 and X A2 Each can independently represent a halogen, a haloalkyl or haloalkoxy group containing 1-5 carbon atoms, or a haloalkenyl or haloalkenoxy group containing 2-5 carbon atoms. n A11 Represents 0, 1, 2, or 3, when n A11 When =2 or 3, the ring They can be the same or different, Z A11 They can be the same or different; n A12 Represents 1 or 2, where when n A12 When =2, the ring They can be the same or different; and n A2 Represents 0, 1, 2, or 3, where when n A2 When =2 or 3, the ring They can be the same or different, Z A21 They can be the same or different.

11. The application of the single-sided privacy-protecting liquid crystal display device according to any one of claims 1-10 in the field of single-sided privacy protection.

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